锻压技术

转速对铜材连续挤压产品组织性能的影响

英文标题：Effects of rotational speed on microstructure and mechanical properties of copper strip during continuous extrusion

作者：陈莉裴久杨刘元文宋宝韫

单位：大连交通大学

关键词：铜扁线连续挤压转速再结晶数值模拟

分类号：

出版年,卷(期):页码：2014,39(4):54-58

摘要：

采用数值模拟和工程实验相结合，研究转速对铜材连续挤压成形过程和产品组织性能的影响。通过数值模拟分析了铜扁线连续挤压成形中不同转速下材料和模具温度场分布的规律；通过对工程实验样品进行分析，得到不同转速下产品的微观组织和力学性能。结果表明：随着挤压轮转速的增加，产品出口的温度和腔体内坯料的温度逐渐升高，晶粒回复再结晶程度增加并长大；产品的抗拉强度、硬度和伸长率均随着转速的增高而降低。

The effects of rotational speed on the microstructure and mechanical properties of copper strip during continuous extrusion were studied using the combination of numerical simulation and engineering test. The temperature distributions of material and die under different rotational speeds during continuous extrusion of copper strip were analyzed by numerical simulation. The microstructure and mechanical properties of products under different speeds were achieved by the analysis of samples from engineering test. The results show that the temperatures of die open and blank in chamber increase with the increased rotational speed of extrusion wheel, and so does the percentage of recovery and recrystallization of grain，even grows up. While the tensile strength, hardness and elongation decrease with the increased rotational speed.

基金项目：

国家“十二五”科技支撑计划（2011BAE23B01）；国家自然科学基金资助项目（511750）；辽宁省教育厅科学研究资助项目（L2012154）

陈莉(1978-),女，博士研究生，讲师

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